[OU] [ou] 4 Mail accounts active, but 8 found in opera/mail/store

[Caprivi]

When switching from my version 9.2 to 9.5 Opera created additional
accounts.
I actually have 4 accounts and in opera\mail\accounts there were account 1
to 4. Now there are 1 to 8.
I would like to reduce them again to 1 to 4.
Where must I 'instruct' Opera (.ini ?) to again activate account 1-4
instead 5-8 ?

Thanks for your replies.
Axel k.